import time
import os
s1 = 'wangpandong'
for i in s1  :
    print(i)
    time.sleep(0.1)

s2= ['w','a','n','g']
for i in s2:
    print(i)
    time.sleep(0.1)

print(s1[1])
print(s2[1])

s3 = {1: "wangpandong",2 : "yangguanfang"}
print(s3[1])
print('s3[1][0] = ',s3[1][0])


path = 'D:/Userdata/'
for dirname in os.listdir(path) :
    if os.path.isdir(dirname)  :
        print(dirname)
        continue